Unable to detect baudrate

Hello Everyone

so yesterday my new Geeetech a10 arrived.. I was totally happy and plugged my Raspberry pi 3 with octoprint into my new printer. The last months it worked with my Geeetech prusa i3 pro b but now it's not able to connect.
when I click connect with serial port - auto, baudrate - auto I just get the message "Error: No more baudrates to test, and no suitable baudrate found."
I already tried to set the port and the baudrate but he's not connecting as well

can anybody help me?

Hi @Claimaach,

do you get connection when you plug the USB cord to you PC?

tried it and it works..